Following World War II, there was concern that Americans weren't getting enough protein, vitamins, and minerals in their diet. Government officials developed what they called the 'Basic Four Food Groups.' Later, in the 1950's, the government updated the information and called it the 'Daily Food Guide.' As scientists discovered new information about nutrition, the food groups continued to evolve. In 1991, the U-S Department of Agriculture developed the 'Food Guide Pyramid,' which places the foods that are recommended to be consumed in the largest quantities atthe base of the pyramid. These include bread, cereals, rice, and pasta. Next up the pyramid are two groups that previously were combined: the vegetable group and the fruit group. Continuing up the scale are two more groups. Milk, yogurt, and cheese are in one group; meat, poultry, fish, dried beans, eggs, and nuts are above that. This group reflects the various sources of protein. The top of the pyramid contains fats, oils, and sweets, with the caution to 'use sparingly.'